ADS7844NBG4

Analog To Digital Converters (ADC) Overview

The ADS7844NBG4 is a 12-bit, 8-channel serial output sampling analog-to-digital converter (ADC) manufactured by Texas Instruments. It utilizes a successive approximation register (SAR) architecture to achieve a maximum sampling rate of 200 kS/s. The device supports pseudo-differential and single-ended input types with an analog supply voltage range of 2.7 V to 5.25 V and a digital supply voltage range of 1.9 V to 5.5 V. Key performance metrics include a signal-to-noise-and-distortion ratio (SINAD) of 72 dB, differential nonlinearity (DNL) of ±1 LSB, and integral nonlinearity (INL) of ±1 LSB. It operates within a temperature range of -40°C to +85°C and is housed in a 20-SSOP package.

Analog To Digital Converters (ADC) Feature Summary

• Eight-channel multiplexed input capability supporting both pseudo-differential and single-ended configurations for versatile signal acquisition.
• Low power consumption design with typical dissipation of 1.8 mW, suitable for battery-operated systems.
• Serial peripheral interface (SPI) compatibility simplifies connection to microcontrollers and digital signal processors.

Analog To Digital Converters (ADC) Applications

• Portable multichannel data loggers requiring low power and high channel count.
• Personal digital assistants and handheld measurement equipment.
• Industrial monitoring systems needing precise multi-point analog signal digitization.

Analog To Digital Converters (ADC) Procurement Notes

Verify the component marking on the physical device against the datasheet specifications. Official documentation indicates that the 'B' suffix may be omitted from the surface marking, meaning devices marked as ADS7844N are functionally equivalent to the ADS7844NB variant. Ensure the ordering part number matches the required package and temperature grade before finalizing procurement to avoid confusion during assembly.

Analog To Digital Converters (ADC) Selection Notes

Select this component when designing systems requiring eight analog inputs with 12-bit resolution and moderate speed up to 200 kSPS. It is appropriate for applications where power efficiency is critical, such as portable instrumentation. Compare DNL and INL specifications against system accuracy requirements; this device offers ±1 LSB linearity. Ensure the host processor supports the synchronous serial interface timing requirements defined in the electrical characteristics section.

Analog To Digital Converters (ADC) Part Context

This part belongs to the ADS7844 family of 12-bit ADCs from Texas Instruments. It is pin-compatible with other variants in the series, such as the ADS7844E and ADS7844N. The 'BG4' suffix typically denotes specific packaging and environmental compliance details, specifically the SSOP-20 package and lead-free/RoHS status, consistent with Texas Instruments' standard naming conventions for this product line.

Analog To Digital Converters (ADC) Replacement Considerations

The ADS7844N is a confirmed functional substitute for the ADS7844NB, as official support forums indicate standardized marking practices where the 'B' suffix is omitted from the device body despite being the same internal component. Verify package dimensions and pinout compatibility if substituting with other ADS784x family members.